I could kibitz you could kibitz he could kibitz we could kibitz you could kibitz they could kibitz
V-ing form
I could be kibitzing you could be kibitzing he could be kibitzing we could be kibitzing you could be kibitzing they could be kibitzing
Perfect
I could have kibitzed you could have kibitzed he could have kibitzed we could have kibitzed you could have kibitzed they could have kibitzed
V-ing perfect
I could have been kibitzing you could have been kibitzing he could have been kibitzing we could have been kibitzing you could have been kibitzing they could have been kibitzing
Negation
Simple form
I could not kibitz you could not kibitz he could not kibitz we could not kibitz you could not kibitz they could not kibitz
V-ing form
I could not be kibitzing you could not be kibitzing he could not be kibitzing we could not be kibitzing you could not be kibitzing they could not be kibitzing
Perfect
I could not have kibitzed you could not have kibitzed he could not have kibitzed we could not have kibitzed you could not have kibitzed they could not have kibitzed
V-ing perfect
I could not have been kibitzing you could not have been kibitzing he could not have been kibitzing we could not have been kibitzing you could not have been kibitzing they could not have been kibitzing
Interrogative form
Simple form
could I kibitz? could you kibitz? could he kibitz? could we kibitz? could you kibitz? could they kibitz?
V-ing form
could I be kibitzing? could you be kibitzing? could he be kibitzing? could we be kibitzing? could you be kibitzing? could they be kibitzing?
Perfect
could I have kibitzed? could you have kibitzed? could he have kibitzed? could we have kibitzed? could you have kibitzed? could they have kibitzed?
V-ing perfect
could I have been kibitzing? could you have been kibitzing? could he have been kibitzing? could we have been kibitzing? could you have been kibitzing? could they have been kibitzing?
Interro-negative form
Simple form
could I not kibitz? could you not kibitz? could he not kibitz? could we not kibitz? could you not kibitz? could they not kibitz?
V-ing form
could I not be kibitzing? could you not be kibitzing? could he not be kibitzing? could we not be kibitzing? could you not be kibitzing? could they not be kibitzing?
Perfect
could I not have kibitzed? could you not have kibitzed? could he not have kibitzed? could we not have kibitzed? could you not have kibitzed? could they not have kibitzed?
V-ing perfect
could I not have been kibitzing? could you not have been kibitzing? could he not have been kibitzing? could we not have been kibitzing? could you not have been kibitzing? could they not have been kibitzing?